Historical and recent exploration has defined a prominent copper porphyry target supported by geochemical and geophysical surveys, and drilling. In 2025, the maiden Rio De Oro diamond drilling program (3,564 m) intersected alteration and large intersections of low-grade copper mineralisation consistent with the upper levels of a porphyry copper system. Intersections, included:

• Hole 2 – 368m @ 0.14% Cu from 18m; and
• Hole 3 – 335m @ 0.17% Cu from 96m.

Drilling at shallow levels also intersected zones of significant chalcocite enrichment including:

• Hole 1 – 36m @ 0.42% Cu from 9m;
• Hole 2 – 42m @ 0.35% Cu from 20m; and
• Hole 3 – 42m @ 0.26% Cu from 140m.

Logging of the core holes has demonstrated a transition from copper oxides to increasing amounts of chalcopyrite-bearing sulphides at depth. This is complimented by increasing vein density on the edges of the interpreted porphyry system. All data indicates that a higher-grade porphyry core may be present at depth to the west of the historical drilling which only tested the margins of a large-scale copper-molybdenum system.